This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
| n | a(n) |
|---|---|
| 1 | 16 |
| 2 | 256 |
| 3 | 1152 |
| 4 | 5369 |
| 5 | 21517 |
| 6 | 71928 |
| 7 | 247631 |
| 8 | 778010 |
| 9 | 2406006 |
| 10 | 7360306 |
| 11 | 21881127 |
| 12 | 65146723 |
| 13 | 191700402 |
| 14 | 561478139 |
| 15 | 1642808262 |
| 16 | 4784514520 |
| 17 | 13933101566 |
| 18 | 40513685939 |
| 19 | 117692339295 |
| 20 | 341873087318 |
| 21 | 992380089279 |
| 22 | 2880509432926 |